Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 06 May 2015, 14:37

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

The average (arithmetic mean) monthly balance in Company X's

Author Message
TAGS:
Manager
Joined: 10 Dec 2007
Posts: 54
Followers: 1

Kudos [?]: 12 [0], given: 0

The average (arithmetic mean) monthly balance in Company X's [#permalink]  29 Jan 2008, 10:00
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
The average (arithmetic mean) monthly balance in Company X's petty cash account on any given date is the average (arithmetic mean) of the closing balances posted on the last business day of each of the past 12 months. On March 6, 1990, the average (arithmetic mean) monthly balance was $692.02. What was the average (arithmetic mean) monthly balance as of June 23, 1990 ? (1) As of June 23, 1990, the total of all the closing balances posted on the last business day of each of the last 12 months was$45.64 less than it had been on March 6, 1990.

(2) The closing balances posted on the last business days of March, April, and May, 1990 were $145.90,$3,000.00, and \$725.25, respectively.

I thought this was pretty tough. Spoiler below

[spoiler]OA is A[/spoiler]
Director
Joined: 01 Jan 2008
Posts: 629
Followers: 3

Kudos [?]: 139 [0], given: 1

Re: DS: Average monthly balance [#permalink]  29 Jan 2008, 10:45
the problem deals with average balance = (x_i+ ... + x_{i-11})/12.

1 is sufficient: 692.02 - 45.64/12 (because new total is 692.02*12 + 45.64)
2 is insufficient - new total can not be calculated because no information about cash balance for March, April, May of 1989.
Re: DS: Average monthly balance   [#permalink] 29 Jan 2008, 10:45
Similar topics Replies Last post
Similar
Topics:
Averages (Arithmetic Means) 0 04 Nov 2014, 08:39
5 The average (arithmetic mean) monthly income of four workers 4 25 Feb 2013, 09:09
4 At a certain company, average (arithmetic mean)number of 3 25 Aug 2012, 14:38
1 The average (arithmetic mean) monthly balance in Company X's 2 09 Mar 2010, 14:32
4 At a certain company, the average (arithmetic mean) number 4 17 Oct 2007, 18:01
Display posts from previous: Sort by